a small patch to fix two issues with cartoon meshes
(1) the vertices were not correctly ordered around the cartoon control points which did not look nice esp. for low hermiteLevel values. This happend because the wing vector was rotated control point one step too early
(2) mesh triangles from opposing sides could cut through each other exposing the inside of the cartoon mesh. This happened because the triangles of opposing quads were not draw congruent, so they would clip esp. for high ribbonAspectRatio values.